Metal-bender.



Patented Deeember 2o, 1904.

` UNITED STATES lPATENT OFFICE..

JAMES H. vAN DEEBILT, or EAIEVILLE, NEW YORK.

METAL-BENDER.

SPECIFICATION forming part of Letters Patent No. 778,158, dated December20, 1904. i

l Application filed September 16, 1904. Serial No. 224,635.

To all whom, it may concern:

-ferred manner of carrying out the invention is set forth in-thefollowing full, clear, and exact description, terminating with a-claimparticularly specifying the novelty.

This invention relates to metal-'working machines, and more especiallyto those which are used for forming-threads on sheet metal;-

and the object of the same is to produce a machine whichv willstrengthen or deepen the threads in sheet-metal ca ps or covers such asare usually employed for closing jars which contain preserves and thelike. These caps are frequently made of such light material that long orcontinued use partially flattens out their threads. so that they nolonger screw tightly onto the threads of the neck of the jar, and it ismy purpose to produce a cheap machine for use whereby the threads ofthecaps -can bedeepened when it becomes necessary.

,To this end the invention consists in the construction described belowand illustrated in the drawing. l

Referring to the drawing, l'designates a icasting constituting theframework of this machine, and 2 is a set-screw` in the lower arm of thesame by .which the device may be mounted on the edge of a table, as wellunderstood. f

3 3 represent a pair of rolls connected by intermeshing gears 4, and theouter ends of these rolls bear ribs 5, alternating with each other, asshown. rlhelowermostroll is mounted on the main driving-shaft, which isjournaled in the framework, and 6 is a crank-handle for rotating thisshaft, and thereby driving both the rolls.

The upper roll .is mounted on a stub-shaft 15, formed at the outer endof a bar 11, which is pivoted at 16 to the rear portion'of the casting,by which construction the upper roll Obviously such lifting of thepivoted bar 11 disengages the gears 4. Through said bar is threaded ascrew 12 with a knob or crankhandle at its upper end and a knob or head13 at its lower end, which end enters an upright socket 14 in theframework. Threaded through the latter ina horizontal position is aset-screw 17, having a reduced point or tip which enters the groove inthe screw 12 above its head 13. y l

To insert the jar-cap, the set-screw 17 may be retracted until itdisengages the screw 12, and the upper roll is lifted, the cap inserted,and the roll' brought again down into place. When the tip of the screw17 `engages the groove in the screw 12, it is obvious that by turningthe latter through the pivoted bar the upper roll can be adjusted to theproper degree of tension.

It will be noticed thatthe socket 14 is made rather wide, so thatthereis considerable play for the head 13 in a direction away from thetip of the screw 17. This is intentional, and it serves the doublepurpose of permitting adjustment and also of permitting the head I donot limit myself to the specific use of the machine above described,nor, in fact, to the use of `the ribs 5 at4 all, because if they wereomitted the rolls 3 might cooperate with each other to perform a varietyof services.

What is claimed as new is In a machine of the type described, thecombination with a framework having an upright socket, a power-shaftjournaled through the framework, and a roll and a gear on said shaft; ofa bar pivoted atits rear end in the framework and having a stub-shaft'at its front end, a roll and a gear journaled on said stub shaft, anadjusting screw threaded In testimony whereof I have hereunto suhthroughthis bar and having a head at its scribed my signature this the 8th dayo1 Sep lower end adapted to enter said socket, and teinher, A. D. 1904.

a set-screw threaded into the casting` at an JAMES H. VAN DICHBI'L'I.angle to said adjusting-screw With its tip en- Titnessesz gagging abovethe head of the latter, all as and Enomr G. S'rnnn'rm,

for the purpose set forth. MARY E. VHi'iMAN.

